Land vehicles: dumping – Tilting – Operating mechanism
Patent
1985-11-01
1987-04-21
Spar, Robert J.
Land vehicles: dumping
Tilting
Operating mechanism
298 5, B60P 112
Patent
active
046591478
ABSTRACT:
A dump trailer includes a frame attached below a trailer bed and having a first pair of parallel outer rails which are inclined upwardly from front to rear and a pair of center rails which are inclined downwardly from front to rear. A towing tongue extends along the center line of the frame and includes a forked end having a first pair of rollers engaging the first pair of rails and a second pair of rollers which engage the center rails. Pairs of wheels are disposed on each side of the bed and are mounted on the ends of leading and trailing arms pivotally mounted on the frame. A strut is adapted to be coupled to the arms at points above or below the wheel spindles for raising and lowering the bed relative to the wheels. The trailer is dumped by using a prime mover to force the tongue rearwardly thereby moving the rollers backwardly along their respective rails to pivot the frame and bed about the axis of the rear wheels. A brake actuated by the motion of the towing tongue locks the bed in its pivoted position until released.
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patent: 2057833 (1936-10-01), Jungersen
patent: 2566556 (1951-09-01), Cunningham
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patent: 3858939 (1975-01-01), Bond et al.
patent: 4068892 (1978-01-01), Welch
patent: 4392687 (1983-07-01), O'Connell
Krizek Janice
Spar Robert J.
Wiviott Fred
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